Fossils pt.2
What is paleontology?
the study of fossils
which planet is the only known planet to have oxygen&water?
earth
what is continental drift?
the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to
their present locations.
how are earthquakes caused
When tectonic plates move, sudden shifts can occur along their boundaries. These sudden movements cause earthquakes.
give an example of what we can use to date the earth.
asteroids, meteorites, lunar rocks
which type of organisms usually become fossils?
a: organisms that were buried quickly b:animals that were ignored by passing animals c:organisms that lived in water d:animals that had hard outer shells.
A
name the inner planets
Mercury, Venus, Earth, and Mars,
when did the "supercontinent" start drifting apart
a:2million years ago b:250million years ago c: 5million years ago d: 325 million years ago
b: 250 million years ago.
true or false:
plate boundaries only exist along the continents and do not exist in the ocean.
false
how old is the oldest rock on earth?
a:3.7 billion years old b: 5.4 billion years old c:250 million years old d:4.2 billion years old
d: 4.3 billion years old
why are most fossils found in sedimentary rock?
the sediments that cover the fossil slow or stop the process of decay and protect the body of the organism from damage.
what are the inner planets mostly made up of?
they consist of solid rock and metallic cores.
what was the "supercontinent" called?
pangea
what are the three types of plate boundaries?
divergent boundaries, convergent boundaries, and transform boundaries.
true or false:
One way to estimate absolute age is to study rates of erosion.
true
cast
which planet has similar seasons to earth?
mars
define plate tectonics
the theory that explains how large pieces of the lithosphere, called plates, move and change shape
describe a transform boundary.
The boundary in which two plates slide past each other is a transform boundary.
what is weathering and erosion?
Weathering is the process of decomposing, breaking up, or changing the color of rocks // When the smaller rock pieces are moved by these natural forces, it is called erosion.
what does a cast show about an animal?
it provides an exact replica of the animal.
which planet has around the same size, mass, and density as earth?
mercury
true or false:
The lithosphere forms the thin outer shell of the earth & it is broken into blocks called tectonic plates.
true
what do scientist believe cause these plate movements?
convection
name the sedimentary rock structures. (theres 3)
Graded bedding, cross-beds, ripple marks